Hinge



C. FISHER & G. B.l BURNET.

HINGE.

(No Model.)

Patented Deo..20, 1887.

l. F, a

WI TWESSES UNITED STATESY PATENT OFFICE.

CHARLES FISHER AND GEORGE B. BURNET, OF MANITOVOC, VISCONSIN.

HINGE.

EPECFICATION forming part of Letters Patent No. 374,954, dated December20, 1887.

Application lilcd April Q8, 1887. Serial No. 236,472.

(No model.)

To @ZZ whom t may concern.:

Be it known that we, CHARLEs FISHER and GEORGE B. BURNET, of Manitowoc,in the county of Manitowoc and State of Wisconsin, have invented certainnew and useful Improvements in Hinges; and we do hereby declare thefollowing to be a full, clear, and exact description of theinvention,such as will enable others skilled in the art to whichit pertains tomakeand use the same.

Our invention relates to hinges, the object being to provideahinge ofnovel and improved construction,especially adapted for pianolids.

In the accompanying drawings, forming a part of this description,Figures l,- 2, and 8 are cross-section views (on a a, Fig. 5) of apianolid and our improved hinge secured thereto. Fig. 4 is a detail Viewof the hinge, and Fig. 5 is a top view of the piano-lid with our improved hinge iitted thereto.

Like letters in the different iigures refer to the same parts.

A is the larger lid-section of the piano, and B is the smaller lid, orthe one which covers the keyboard.

Our hinge consists of two counterpart plates or leaves, G D, each beingprovided with screw-holes, which serve as a means of attachment to thepiano-lids, the hinge being mortised equally into each of the lids A B,as shown. The upper edge of the plate C is provided with two curvedwings, C', at right angles with the plate C. lThe curved wings C areprovided with elongated slots H, as shown.

The upper edge of the' plate D is provided with three curved wings, D',similar to C,just

described. The curved wings D are also provided with elongated slots H.The curved wings C and D are in suchl positions on their plates thatthey will t within each other or interlock, as shown in Fig, 4, formingaV trough which approximates a semicircle in cross-section, and theimaginary center of which is slightly above the surface ofthe lids A B,as indicated by a dot.

E is a coupling-rod for the two hinged section. In form this rod is lessthan asemi-cylinder, and it lits into the trough formed as abovedescribed. The curved part of this rod E is provided with threaded holesG in the positions shown.

F is a round head-screw, the portion i1n1nediately under its head heiligenlarged to form a collar, M, adapted to slide within the slot H. Thiscollar M of the screw F is just a trille longer than the thickness ofthe curved wings O' D. The portion n of the screw is of less di ameterthan the collar- M, and forms, in connection-with the collar, ashoulder, M. The portion a is threaded to iit the threaded holes G ofthe section E. When the coupling-rod E rests within the trough, as abovereferred to, the threaded holes G are opposite the. slots H of thecurved wings. rlhe hinge is then put together by passing screws F through the slots H and screwing them securely into the rod E, theshoulder h ofthe screw F raising the head of the screw sufficiently toallow the free play of the curved wings C D about the rod E. is evident,however, that the rotative play of the curved wings about the curvedportion of the rod E will be limited to the length of the slots H. Thecenter of this rotative play is thrown above the surface of the lids AB, as indicated by dots in Figs. l, 2, and 3, for the following reason:The lids A and B are very closely fitted. The edges are very sharp andhighly iinished; henceif we swing the lid B on a hinge whose center isabove the surface of the lid the edge of the lid B will be slightlydrawn away from the edge of the lid A, thus preserving the edges of bothlids.. Fig. lshows the position of our improved hinge when lids areclosed.

. Vhen we raisethe lid B, the curved wings D will play around thecoupling rod E the full length of the slots H. Thelength of these slotsin the curved wings D'is such as to allow the curved wings D to playaround the rod E struction herein illustrated and described das,

for instance, tothe number of the curved wings employed and otherdetails-but reserve the right to make allsucli minor changes andmodications as may properly fall within the scope of our invention.

Having fully described our invention, what IOO We claim as new, anddesire to secure by Letters Patent, is-

l. The combination, with two substantially counterpart hinge-leaves,each having:r curved and slotted arms or Wings which interlap, asdescribed, of a connecting-r0d to which seid wings are secured,substantially its described.

2. The combination, with the hinge-leaves having interlapping Wingsformed with elongated slots, as described, of a connecting-piece nearlysemicircular in cross-section, said slotted Wings being secured byscrews passing vthrolugh the slots thereof, whereby the wings of'oneofthe leaves have a limited movement yupon the connecting-piece and thelatter a lini- 3. The combination, with the hinge-leaves, each havingcurved wings formed with elongated slots, of the approximatelysemi-cylindrical coupling rod formed with screwthreaded holes, and thescrews F, each formed with collars to bear within theslots of the curvedWings, substantially as described.

In testimony whereof We have signed this specification in the presenceof two subscribing Witnesses.

CHARLES FISHER. Yeno. B. BURNET.

Vitnesses:

C. LULING, C. C. BARNES.

